Class Document-extended introduction.pdf

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Wroclaw University of Technology,
Faculty of Mechanical Engineering
Simulation of Production Processes
Course tutors:
PhD Eng. Arkadiusz Kowalski
MSc. Eng. Michał Olejarczyk
MSc. Eng. Andrzej Pawlak
Simulation of Production Processes - Course schedule
INTRODUCTION
EXERCISE 1
EXERCISE 2
EXERCISE 3
EXERCISE 4
EXERCISE 5
EXERCISE 6
EXERCISE 7
EXERCISE 8
EXERCISE 9
EXERCISE 10
EXERCISE 11
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Deterministic model – determination of arrival
frequencies
Model evolution - Heat Treatment process
Model evolution – Quality control
Introduction to production plan diversification
Model evolution – Assembly process
Definition of different transport modes, and costs
Symulation of nondeterministic production plan model
Definition of downtimes during work and macros
definition
Definition variables and attributes characterizing analysed
manufacturing system
SimRunner software, first optimization
SimRunner software, second optimization
Introduction
Building a simulation model in the ProModel environment consists of the following steps,
corresponding to the modules available from the
Build
menu:
Selecting the types of machines and other stations, where manufacturing processes will be
run. (Locations),
Defining the product (Entities),
Adding the path of work (Path
Networks),
Determination of productive resources (Resources),
Creating the process logic (Processing),
Scheduling tide products. (Arrivals).
Before creating a new model, you have to define the time and distance units as well as the Graphic
Library to be used in your simulation (menu File/New/General Information or Build/General
Information). There you also have the possibility to introduce logic conditions, which support the
initiation and termination of the simulation process. This interface does not save your model, so
make sure to save your file before commencing (menu File/Save As).
Fig. 1. Dialog box when opening a new model
Another consideration before starting is the option to either create your own personal background
upon which the system is going to be built (menu Build/Background Graphics/Front of Grid or
Build/Background Graphics/Behind Grid) or import a graphic file (Edit/Import Graphic), ending in:
*.bmp, *.pcx, *.gif or *.wmf. Next the grid parameters (View/Layout Settings/Grid Settings) should
be determined, to match the spacing between grid lines with the real-world or predefined spacing.
Module
Locations
(picture below) allows the representation of the physical workstation, which will
carry out technological operations and procedures, or where decisions are taken. Workstations are
placed in the system simulation by selecting them from a graphical menu and inserting them into the
Layout
window.
The distances between Workstations are defined in the next steps. It is possible to describe devices
that you insert and edit or scale them. Background image can represent, for example the modelled
system.
Graphics library of machines and equipment can be extended with your own machinery and
equipment, transport means using graphics editor (Graphics
Editor).
Parameters defining
the machinery and equipment included:
Icon, Name, Capacity, Units, DTs, Stats, Rules, Notes
are
located in the window
Locations.
Option
Icon
shows the icon used for the graphical representation of
the working area during the simulation, the column
Name
contains its name.
Capacity
allows you to
define performance of a machine (understood as the quantity of items, which also are subject to
manipulation).
Units
option specifies the number of identical work places, and
Stats
generates statistics of different
types (Time
Series
is the most detailed kind of statistics).
Using the editor’s time breaks and exclusions
DTs
allow you to specify the times and conditions
under which a temporary exclusion is to take place during the simulation machine.
Here is used
tpz
time as the setup time (Setup
downtimes).
Define rules for incoming and outgoing parts of production equipment in the
Rules
window.
There are listed possible ways of choosing items that are pending at the entrance: the oldest priority,
random, the smallest available capacity, while at the exit can set the following priorities: no queues,
FIFO, LIFO, "after the type."
Module
Entities
(elements, units), which during the simulation process are the subject of action or
decision taken, for example, product components, assemblies, products. We define the elements to
transport the technology manipulation.

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